package com.nepenthe.Utils;

import com.nepenthe.dao.UserMapper;
import org.apache.ibatis.io.Resources;
import org.apache.ibatis.session.SqlSession;
import org.apache.ibatis.session.SqlSessionFactory;
import org.apache.ibatis.session.SqlSessionFactoryBuilder;

import java.io.IOException;
import java.io.InputStream;


/*
sqlsessionfactory-->sqlSession
 */
public class MybatisUtils {
    private static SqlSessionFactory sqlSessionFactory;

    static {
        try {
            //1.获取sqlSessionFactory对象
            String resource = "mybatis-config.xml";
            InputStream inputStream = Resources.getResourceAsStream(resource);
            sqlSessionFactory = new SqlSessionFactoryBuilder().build(inputStream);
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    //获取sqlSession实例
    //sqlSession完全包含了面向数据库执行sql命令所需的所有方法。
    public static SqlSession getsqlSession() {
        return sqlSessionFactory.openSession();
    }

    public static UserMapper getMapper() {
        return MybatisUtils.getsqlSession().getMapper(UserMapper.class);
    }
}
